Research Article

Estimating the reproducibility of psychological science

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Science  28 Aug 2015:
Vol. 349, Issue 6251, aac4716
DOI: 10.1126/science.aac4716

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  1. Original study effect size versus replication effect size (correlation coefficients).

    Diagonal line represents replication effect size equal to original effect size. Dotted line represents replication effect size of 0. Points below the dotted line were effects in the opposite direction of the original. Density plots are separated by significant (blue) and nonsignificant (red) effects.

  2. Fig. 1 Density plots of original and replication P values and effect sizes.

    (A) P values. (B) Effect sizes (correlation coefficients). Lowest quantiles for P values are not visible because they are clustered near zero.

  3. Fig. 2 Scatterplots of original study and replication P values for three psychology journals.

    Data points scaled by power of the replication based on original study effect size. Dotted red lines indicate P = 0.05 criterion. Subplot below shows P values from the range between the gray lines (P = 0 to 0.005) in the main plot above.

  4. Fig. 3 Original study effect size versus replication effect size (correlation coefficients).

    Diagonal line represents replication effect size equal to original effect size. Dotted line represents replication effect size of 0. Points below the dotted line were effects in the opposite direction of the original. Density plots are separated by significant (blue) and nonsignificant (red) effects.